<?php

// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id: Page.class.php 2601 2012-01-15 04:59:14Z liu21st $

class Pageeeso {

    // 分页栏每页显示的页数
    public $rollPage = 5;
    // 页数跳转时要带的参数
    public $parameter;
    // 默认列表每页显示行数
    public $listRows = 20;
    // 起始行数
    public $firstRow;
    // 分页总页面数
    protected $totalPages;
    // 总行数
    protected $totalRows;
    // 当前页数
    protected $nowPage;
    // 分页的栏的总页数
    protected $coolPages;
    // 分页显示定制
    // protected $config  =	array('header'=>'条记录','prev'=>'上一页','next'=>'下一页','first'=>'第一页','last'=>'最后一页','theme'=>' %totalRow% %header% %nowPage%/%totalPage% 页 %upPage% %downPage% %first%  %prePage%  %linkPage%  %nextPage% %end%');
    protected $config   = array('header' => '条记录', 'prev'   => '上一页', 'next'   => '下一页', 'first'  => '第一页', 'last'   => '最后一页', 'theme'  => ' %totalRow% %header% %nowPage%/%totalPage% 页 %upPage% %downPage% %first%  %prePage%  %linkPage%  %nextPage% %end%');

    /**
      +----------------------------------------------------------
     * 架构函数
      +----------------------------------------------------------
     * @access public
      +----------------------------------------------------------
     * @param array $totalRows  总的记录数
     * @param array $listRows  每页显示记录数
     * @param array $parameter  分页跳转的参数
      +----------------------------------------------------------
     */
    public function __construct($totalRows, $listRows = '', $parameter = '') {
        $this->totalRows = $totalRows;
        $this->parameter = $parameter;
        if (!empty($listRows)) {
            $this->listRows   = intval($listRows);
        }
        $this->totalPages = ceil($this->totalRows / $this->listRows);     //总页数
        $this->coolPages  = ceil($this->totalPages / $this->rollPage);
        $this->nowPage    = !empty($_GET[C('VAR_PAGE')]) ? intval($_GET[C('VAR_PAGE')]) : 1;
        if (!empty($this->totalPages) && $this->nowPage > $this->totalPages) {
            $this->nowPage  = $this->totalPages;
        }
        $this->firstRow = $this->listRows * ($this->nowPage - 1);
    }

    public function setConfig($name, $value) {
        if (isset($this->config[$name])) {
            $this->config[$name] = $value;
        }
    }

    /**
      +----------------------------------------------------------
     * 分页显示输出
      +----------------------------------------------------------
     * @access public
      +----------------------------------------------------------
     */
    public function show() {
        if (0 == $this->totalRows)
            return '';
        $p           = C('VAR_PAGE');
        $nowCoolPage = ceil($this->nowPage / $this->rollPage);
        $url         = $_SERVER['REQUEST_URI'] . (strpos($_SERVER['REQUEST_URI'], '?') ? '' : "?") . $this->parameter;

        $parse = parse_url($url);
        if (isset($parse['query'])) {
            parse_str($parse['query'], $params);
            unset($params[$p]);
            $url     = $parse['path'] . '?' . http_build_query($params);
        }
        //上下翻页字符串
        $upRow   = $this->nowPage - 1;
        $downRow = $this->nowPage + 1;
        if ($upRow > 0) {
            $upPage = "<a href='" . $url . "&" . $p . "=$upRow'>" . $this->config['prev'] . "</a>";
        } else {
            $upPage = "";
        }

        if ($downRow <= $this->totalPages) {
            $downPage = "<a href='" . $url . "&" . $p . "=$downRow'>" . $this->config['next'] . "</a>";
        } else {
            $downPage = "";
        }
        // << < > >>
        if ($nowCoolPage == 1) {
            $theFirst = "";
            $prePage  = "";
        } else {
            $preRow   = $this->nowPage - $this->rollPage;
            $prePage  = "<a href='" . $url . "&" . $p . "=$preRow' >上" . $this->rollPage . "页</a>";
            $theFirst = "<a href='" . $url . "&" . $p . "=1' >" . $this->config['first'] . "</a>";
        }
        if ($nowCoolPage == $this->coolPages) {
            $nextPage = "";
            $theEnd   = "";
        } else {
            $nextRow   = $this->nowPage + $this->rollPage;
            $theEndRow = $this->totalPages;
            $nextPage  = "<a href='" . $url . "&" . $p . "=$nextRow' >下" . $this->rollPage . "页</a>";
            $theEnd    = "<a href='" . $url . "&" . $p . "=$theEndRow' >" . $this->config['last'] . "</a>";
        }
        // 1 2 3 4 5
        $linkPage  = "";
        for ($i = 1; $i <= $this->rollPage; $i++) {
            $page = ($nowCoolPage - 1) * $this->rollPage + $i;
            if ($page != $this->nowPage) {
                if ($page <= $this->totalPages) {
                    $linkPage .= "&nbsp;<a href='" . $url . "&" . $p . "=$page'>&nbsp;" . $page . "&nbsp;</a>";
                } else {
                    break;
                }
            } else {
                if ($this->totalPages != 1) {
                    $linkPage .= "&nbsp;<span class='current'>" . $page . "</span>";
                }
            }
        }
        $pageStr = str_replace(
                array('%header%', '%nowPage%', '%totalRow%', '%totalPage%', '%upPage%', '%downPage%', '%first%', '%prePage%', '%linkPage%', '%nextPage%', '%end%'), array($this->config['header'], $this->nowPage, $this->totalRows, $this->totalPages, $upPage, $downPage, $theFirst, $prePage, $linkPage, $nextPage, $theEnd), $this->config['theme']);
        return $pageStr;
    }

}